package com.lagou.rabbitmq.demo.config;

import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.DirectExchange;
import org.springframework.amqp.core.Exchange;
import org.springframework.amqp.core.Queue;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.HashMap;
import java.util.Map;

@Configuration
public class RabbitConfig {

  @Bean
  public Queue queue() {

    Map<String, Object> props = new HashMap<>();
    // 消息的生存时间 10s
    props.put("x-message-ttl", 5000); // 设置该队列所关联的死信交换器（当队列消息TTL到期后依然没有消费，则加 入死信队列）
    props.put("x-dead-letter-exchange", "ex.go.dlx");
    // 设置该队列所关联的死信交换器的routingKey，如果没有特殊指定，使用原 队列的routingKey
    props.put("x-dead-letter-routing-key", "go.dlx");
    Queue queue = new Queue("q.go", true, false, false, props);

    return queue;
  }

  @Bean
  public Queue queueDlx() {
    Queue queue = new Queue("q.go.dlx", true, false, false);
    return queue;
  }

  @Bean
  public Exchange exchange() {
    DirectExchange exchange = new DirectExchange("ex.go", true, false, null);
    return exchange;
  }


  /*** 死信交换器 * @return */
  @Bean
  public Exchange exchangeDlx() {
    DirectExchange exchange = new DirectExchange("ex.go.dlx", true, false, null);
    return exchange;
  }

  @Bean
  public Binding binding() {
    return BindingBuilder.bind(queue()).to(exchange()).with("go").noargs();
  }

  /*** 死信交换器绑定死信队列 * @return */
  @Bean
  public Binding bindingDlx() {
    return BindingBuilder.bind(queueDlx()).to(exchangeDlx()).with("go.dlx").noargs();
  }

}
